Seeking help with instrumentation terminology.
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May I ask what 5A and 3A mean in terms of the pressure gauge’s range?
I think what you have here isn’t a pressure gauge but rather a pressure transmitter. The range of such transmitters is determined during the selection process. In the case of Rosemount transmitters, for example, their range is 1–5. The letter “A” indicates the type of signal output by the transmitter; “A” stands for 4–20mA, with support for the HART protocol. The maximum measurement value for a 3A model is 250 KPa. I’m not sure if my understanding is correct; this is just for reference
How should I understand that the 3A upper limit is 250 kPa? Thank you
It should be a Rosemount pressure transmitter; 3A and 5A are codes for the range specifications
3A and 5A are part of the Rosemount transmitter model numbers; they apply only to Rosemount-brand instruments